Dilian Georgiev

Plovdiv University "Paisii Hilendarski" · Department of Ecology and Environmental Protection

All literature data was surveyed and critically reviewed. The new materials were collected as sieved soil and detritus samples, or by hand. A total of 109 mollusc species are known to occur in Sarnena Gora Mts. Eight were new records to the area.

A total of 47 active badger burrows in the Southeastern Bulgaria were described in order to find whether there are preferences to terrain exposure for its digging activity. The most of the dens were found on terrain with south exposure-23.4%, followed by these on the east and west side-19.15% each. The dens faced to these three directions, together...

A new species of Thylacella was collected from Unguja Island (Zanzibar, Tanzania) and described in this paper. A simple identification key is also proposed for all the species known from Africa and Madagascar. Now from this genus a total of 19 recent and two fossil species are known.

Psocoptera were collected from French Guiana (near Montjoly town and Wayki village) by beating the vegetation between 29.07-05.08.2023. At least 14 species from seven families of Psocoptera were collected. Nine of them were new records for French Guiana (four new records for the New World) and five were already known for this area.

A new species of Tapinella Enderlein, 1908 was described from French Guiana-T. montjoliensis n. sp. It was collected near Montjoly Town and Wayki Village. The species was found in a plantation and a village from dry banana (Musa sp.) leaves, and among river bank scrubs from dry leaves of various bushes.

In this study, the psocids (Psocodea: 'Psocoptera') from caves and other ecosystems in Northeastern Iran were investigated during the years 2022 and 2024. Among them, Psyllipsocus ramburii Selys-Longchamps, 1872, and Lepinotus inquilinus Heyden, 1850, are new to the Iranian fauna. Additionally, all species identified in this study are newly recorde...

This study provides an updated account of the Psocodea species in the Rila Mountains, Bulgaria, with 27 species recorded, including 17 new for the area. Barkflies were collected from various habitats between 2017 and 2024. These findings expand knowledge of the region's biodiversity, but further studies are needed to better understand the distribut...

This study presents the first investigation into the species diversity of psocids (Insecta: Psocodea) in Rwanda. Over a week-long period in July 2024, psocid specimens were collected from three distinct localities: Mount Kigali, Kitabi Village, and the shores of Lake Kivu. Eight species were identified, all of which are new records for Rwanda.

This study describes a new species, Nanopsocus ajabu n. sp., discovered on Unguja Island, Zanzibar. The species exhibits unique morphological characteristics and complex colour patterns. Material was collected and examined following standard protocols, with specimen deposited at the National Museum of Natural History, Sofia, Bulgaria. An identifica...

This study presents novel findings on the Psocoptera (Insecta) fauna of Vietnam, contributing to the understanding of biodiversity in the region. Psocoptera specimens were collected from Tam Dao National Park during October 2023, adding 19 new species to the existing list. These discoveries include species previously unknown to Vietnam and some new...

Two species of the genus Stenopsocus Hagen, 1866 (Insecta: Psocodea) are described from Vietnam, namely S. beroni Georgiev et Quang-Manh, sp. n. and S. tamdaoi Georgiev et Quang-Manh, sp. n. The challenges of species identification in Stenopsocus, particularly regarding morphological variability and the importance of genetic analysis, are discussed...

The genus Strandzhia Georgiev & Glöer, 2013 (Gastropoda: Bythinellidae) was described from the Strandzha Mountain area in southeastern Bulgaria, with its type species, S. bythinellopenia Georgiev & Glöer, 2013. The species was initially found in a spring near the village of Mladezhko, coexisting with Bythinella dedovi (Glöer & Georgiev 2011). This...

The study presents new records of Psocoptera (Insecta) species from Albania, Bulgaria, and Serbia, enhancing the understanding of barkfly diversity in the Balkans. Noteworthy findings include the first records of Hemineura dispar Tetens, 1891 (species complex) from Albania, Mesopsocus immunis (Stephens, 1836) from Albania and Serbia, and Amphigeron...

The circadian activity of selected mammal species and the temporal overlap with human presence or between species were analysed in 2013-2014 on the territory of the Sinite Kamani Nature Park, Eastern Stara Planina. The purpose of this study was to determine how the human presence affected the circadian activity of mammal species in this protected a...

The study presents findings from a survey of terrestrial snails conducted on Unguja Island (Zanzibar). The survey, conducted in March 2024, focused on the eastern coast of the island, specifically around Uroa Village and Kiwengwa Cave. A total of 12 species of terrestrial snails were recorded, including Gulella minutissima (Thiele, 1911), previousl...

This paper describes Archipsocus michamwiensis n. sp., a new species from the family Archipsocidae collected in Zanzibar, Tanzania. The single female (holotype) is macropterous and exhibits distinct reddish-brown colouration, and equal-length tarsal segments. Morphological measurements highlight features such as short antennae and a V-shaped pigmen...

The studied fossil material of birds and mammals from a new Late Pleistocene site in the Stara Planina (Balkan) mountain range is herein presented. The age of the site was determined on the basis of the taxonomic composition of the mammal fauna. A total of 28 taxa (10 birds, 15 small and 3 large mammals) have been identified from 103 bone/teeth spe...

The study presents a new collection of Psocodea (Insecta) from Unguja Island (Zanzibar, Tanzania), conducted during March 3rd to 9th, 2024. Despite recent efforts to explore Psocodea fauna in equatorial and tropical Africa, comprehensive studies in East Africa, particularly along the east coast and inland areas, remain limited. This research contri...

During the period of 02-09.03.2024, the author and their family stayed in a hotel infested with bed bugs in Uroa village, Unguja Island, Zanzibar. Upon returning to Bulgaria (Hrishteni village, Stara Zagota city area), one specimen of Cimex hemipterus (Fabricius, 1803) was found alive in the luggage. This should be the first documented record of th...

The study presents new findings of Peripsocus cf. constrictus Thornton & Wong, 1968, in Uganda, near Buvi village, along the shores of Lake Victoria. Specimens were collected on July 30th, 2022, from a swampy area with bushes, palms, and various hygrophytes. A total of 12 female specimens were collected by beating the vegetation and stored for furt...

New localities of the highly invasive slug Arion vulgaris were recorded in Bulgaria. Some notes on its habitats in the country observed were also reported. A short review on the taxonomy, biology, ecology and the slug general distribution was also made.

This is a short communication of a discovery of the invasive Mediterranean snail species Theba pisana among food products in a market in Bulgaria imported from Spain. A single live juvenile specimen was found among lettuce leaves. Later it was alive kept in a terrarium.

A new species of Tapinella Enderlein, 1908 from Uganda was described and named Tapinella zirobwensis n. sp. It was collected near Zirobwe town, in agricultural lands with eucalypt plantations and bushes. The type material is deposited at the National Museum of Natural History, Sofia, Bulgaria. Only a female specimen was collected and described.

The list of 16 species of the psocids families Caeciliusidae (3), Stenopsocidae (2), Lachesiliidae (1), Liposcelididae (1), Epipsocidae (1), Peripsocidae (2), Elipsocidae (1), Mesopsocidae (1), and Psocidae (4) collected in five regions of Russia is given. One new species is recorded for the fauna of the Chuvash Republic, the Penza Region and the R...

Field surveys were conducted on 10-11.05.2023 and 17-18.06.2023 by observation of live individuals or road kills and active searching under stones and artificial materials. A total of 12 species were recorded: three amphibian species and nine reptiles. Six of the reptile species were new records to Mount Ismaros. Now the list of the herpetofauna of...

The psocid species Cyclopsocus hyalinus Thornton & Smithers, 1984 from the family Calopsocidae is recorded for the fauna of Thailand for the first time. In total, 38 psocid species are known from Thailand. The species was collected in January 2014 in Sakaerat Environmental Research Station in the evergreen forest by light trap. This species is know...

It was the first study on the Psocoptera fauna of the Mordovia State Nature Reserve and National Park «Smolny» (Russia). There were 320 specimens from 28 species and 8 families examined. Two species were new records for Russia: Valenzuela corsicus (Kolbe, 1882) and Oreopsocus montanus (Kolbe, 1884).

As a result of a large-scale study on the small terrestrial mammals (Eulipotyphla, Rodentia, Lagomorpha) of the Sarnena Sredna Gora Mts., through various methodological approaches and methods, we collected data about 2460 individuals, belonging to 30 species. The established species composition represents about 70% of the small terrestrial mammals...

Two new localities of Cochlicella acuta in Bulgaria nearby the Black Sea coasts are recorded. With these new findings, the total number of known localities of the species in Bulgaria becomes three. Cochlicella barbara is reported for the first time from the territory of Montenegro.

Екологията е съвременна, фундаментална, биологична наука, която се нарежда сред най-актуалните през последните десетилетия. Нейна основна задача е изучаването на структурата и функцията на природата и поради широкия обхват на екологичните изследвания, в тях се прилагат много и разнородни методи. Настоящото ръководството има за основна образователна...

A new species of Tapinella Enderlein, 1908 from Phuket Island, Thailand named Tapinella phuketensis n. sp. was described. It was found in a rain forest east of Karon Village at the west coast of the island. The species is unique in having blackish-brown wings with a white stripe in their middle part.

This manual has been created to support the work of employees in the state and private structures dealing with parks and green areas in the settlements places. It can also be used by biologists and naturalists. The chapters are arranged chronologically, presenting the features of abiotic, biotic and anthropogenic environmental factors in parks and...

The study was carried out between 24-27.02.2023, East and South-East of Karon village on Phuket Island, Thailand. At least 13 species from seven families of Psocoptera were collected. Eleven species were new records for Thailand.

A new species named Liposcelis fascipilosa sp. nov. was described from Uganda, Buvi area, a small peninsula at Lake Viktoria NW of Entebbe town, from fallen Village weaver (Ploceus cucullatus) nests beneath a date palm (Phoenix sp.), 00°07'23.0'' N 32°27'13.6'' E, 1133 m a. s. l. The psocids Echmepteryx lunulata Thornton, Lee & Chui, 1972; Hemipsoc...

Finds of four Rhyopsocus species in East Africa were reported, two of which from Uganda were described as new to science. Other two were R. afer from Tanzania, and R. pandanicola from coastal Kenya. Information on the colouration, morphology and somatometrics was provided. An identification key for all known African species was proposed.

new collection of Psocoptera from Uganda revealed 37 species. Thirty six were new records for the country. After this study the current list of barklice of Uganda is comprised of 50 species.

Two new species, one of them belonging to a new genus are described from two caves in North Bulgaria. Polatenia sinuiapertura n. gen. and n. sp. was found in sand deposits at the entrance of Izvora Cave, Polaten District of Teteven Town, and Kolevia toplensis n. sp. found at the water catchment near Toplya Cave at vicinity of village of Golyama Zhe...

The aim of the current work is to study the taxa composition and the ecological status of the mesogeobiont communities in the region of heavy metal pollution near Plovdiv City. In total four sample plots were selcted and one control from clean area. In the plots located in the immediate vicinity of the source of contamination, a low taxonomic diver...

Most of the materials in this paper were according to literature review, with some new information included (about the species Meles meles and Felis silvestris, recently registered at the rural areas of Plovdiv). A total of 38 species were known from the area of Plovdiv city.

Five species were added to the list of the terrestrial snails of Plovdiv City. Now, a total of 94 species are known from the area of the city.

Previous and newly obtained data on the distribution of Eobania vermiculata (O. F. Müller, 1774) from Bulgaria are summarised. New localities and new regions of distribution in the country are reported. Photos of live animals, its habitats and the reproductive system of the species are given. Hypothesis for dual origin of specimens in Bulgarian pop...

Localities of 15 snail species are reported (1 freshwater and 14 terrestrial) in South Coastal Kenya. Most of the species were widely distributed considering previous literature sources, with an exception of Taylo ria (Mac ro g o naxis) quadrilate ralis (Preston, 1910).

Historia naturalis bulgarica 44 (10): 125-128 ISSN 2603-3186 (online) | ISSN 0205-3640 (print) · nmnhs.com/historia-naturalis-bulgarica https://doi. Abstract: The second known species of the genus Microstygia Georgiev et Glöer, 2015 was described, Microstygia lakatnika n. sp. It was found as empty shells in the deposits of the temporary stream of t...

Illumination at night is determined by moon phase, naturally affecting the reproductive activities of nocturnal animals. The European badger (Meles meles Linnaeus, 1758) is a large-sized mustelid that lives throughout Bulgaria. Since information on its reproductive activity is scarce for the country, a two-year camera trap survey was conducted at f...

We present a list with 131 terrestrial gastropod species considered to occur in the area with 18 species being new records. The new records are: Carychium tridentatum (Ellobiidae), Vertigo antivertigo, V. pusilla (Vertiginidae), Vallonia costata, V. enniensis (Valloniidae), Cecilioides acicula (Ferussaciidae), Discus rotundatus (Discidae), Aegopine...

After this study a total of 33 species of psocids are known to occur in Strandzha Mts and its adjacent Black Sea coastal area. The paper reports of 25 species as already published for the area with eight new species records. All psocids were found in or at the edge of forests or scrubs with scattered trees, dominated mainly by Quercus or Pinus spec...

A total of 18 transects near rivers and streams of different sizes in the area of "Strandzha" Nature Park were studied. The otter was found out in 92% of the studied transects of optimal habitats. It can be assumed that the total number of otters in "Strandzha" Nature Park is 60-70 individuals.

Six species of freshwater snails were newly recorded to the area of Strandzha Mts (Bulgaria): Acroloxus lacustris, Anisus spirorbis, Aplexa hypnorum, Planorbarius corneus, Gyraulus albus, and G. laevis. An updated check list was provided for this area containing a total of 27 species. The sum of the Palearctic and Holarctic species is highest in nu...

Four new Psocoptera species were described as new to science from the coastal area of East Africa: Echinopsocus keniensis n. sp., Cerobasis lienhardi n. sp., Lithoseopsis juliani n. sp. (Kenya), and Mepleres gurusamyi n. sp. (Zanzibar). One Nanopsocus species was found only in a nymph stage, and was supposed to be representative of an unknown speci...

The aim of this study was to assess the status of aquatic invasive alien species (IAS) in the shoreline zone of the Bulgarian sector of the Danube River, Danube tributaries, and adjacent standing water bodies in the frame of the Joint Danube Survey 4 (JDS4). Seven benthic macroinvertebrates and seven fish IAS were identified. The crayfish Faxonius...

A new species of the genus Bythinella is described. Its type locality is: SouthWest Bulgaria, Belasitsa Mountains, Leshnishki Waterfall, northern slope of Kongur Peak. Because of its locality position it was compared and with Greek and Macedonian species.

The leaf beetle Cassida seraphina Ménétries, 1836 is recorded for the first time from central Bulgaria based on photographic evidence. The published distribution so far is reviewed.

New information on the species diversity of Psocoptera (Insecta) of East Sub-Saharan Africa was presented. The check list of Kenya was updated with 28 species records, Zanzibar with 2 (and 3 corrected), and South Africa with 3.

. In terms of the biodiversity monitoring and conservation, localities of 9 species of reptiles, 26 species of birds, and 9 species of mammals were reported for the coastal area of Kenya (a stripe of about 20 km between the small river of Congo and the harbour to Chale Island).

This paper provides both, a literature synopsis and new data on the mammalian carnivores in Sredna Gora Mts, Bulgaria. Among the seven methods used for collecting the data, camera trapping was the main one. A total of 10 species were registered, and 3 were assumed to occur in the area.

If useful for someone, I tried to organize my publications till now. I also included and authorship and co-authorship of taxa.

Four Psocoptera species are reported as new records for Bulgaria: Valenzuela corsicus (Kolbe, 1882) (Ihtimanska Sredna Gora Mts), Reuterella helvimacula (Enderlein, 1901) (Rila Mts), Mesopsocus helveticus Lienhard, 1977 and Hyalopsocus contrarius (Reuter, 1893) (both from Sakar Mts). After this article there are a total of 71 psocid species known f...

Historia naturalis bulgarica 44 (1): 5-8 ISSN 2603-3186 (online) | ISSN 0205-3640 (print) · nmnhs.com/historia-naturalis-bulgarica https://doi. Abstract: A new species of the genus Devetakia, Devetakia apostoloui n. sp., is described from Vucha River, South Bulgaria. The new species is the first member of the genus and the first species from ancien...

A new collection of Psocoptera from Samothraki Island revealed 6 species. Four of them were new records for this area. After this study the current list of barklice of the island is comprised of 13 species.

The available data from literature sources and collected material on the spreading of Ixodid ticks in Sarnena Sredna Gora Mountains are presented. A total of 13 species of 6 genera are reported (Hyalomma marginatum (Koch 1844), Hyalomma scupense (Schulze 1919), Rhipicephalus bursa (Canestrini et Fanzago 1877), Rhipicephalus sanguineus (Latreille 18...

Infestation of the road-killed hedgehogs (Erinaceus roumanicus) with Ixodes ticks in some parts of Upper Thracian Plain (Bulgaria) was investigated. A total of 5 tick species from 3 genera were identified.

Infestation of the road-killed hedgehogs (Erinaceus roumanicus) with Ixodes ticks in some parts of Upper Thracian Plain (Bulgaria) was investigated. A total of 5 tick species from 3 genera were identified.

A total of six species of Psocoptera were collected from Egypt (Cairo city – 5 species, Hurghada city – 1 species). Three of them were new records for Egypt.

Abstract. A new species of the genus Bythinella, Bythinella vidinovae sp. nov., is described from a tributary of the Sandanska Bistritsa river, Pirin Mountains, south-western Bulgaria. The new species is an interesting case of a rheophilic species known only from the type locality.

List of the molluscs (Mollusca: Gastropoda & Bivalvia) (terrestrial, freshwater and marine) registered in Bulgaria till 2021.

We present the results of our short survey for Psocoptera at the region of Pieria, North Greece. A total of 15 specimens were collected, belonging to 9 species.

A total of 29 species were registered at the territory of Smolyan Town. Three species were new records to West Rhodopes Mts: Pupilla muscorum (Linnaeus, 1758), Tandonia budapestensis (Hazay, 1881), and Arion sp. from the lusitanicus/ rufus complex.

Three species were added to the list of Psocoptera of Unguja, and one was excluded. A revision of the materials mentioned by Georgiev (2021) revealed two species as new records to the island, and one which was previously misidentified was now corrected. These were Liposcelis puber, L. plesiopuber and Stenocaecilius casarum. All were new records for...

This resource contains spatial data about classical localities of endemic taxa of terrestrial Mollusca from the Western Balkans. Data were compiled within the List of Selected Endemic Terrestrial Plant and Animal Taxa of South-East Europe. Support for developing this list was provided by the Open Regional Fund for South-East Europe – Biodiversity (...

In the present article, we summarised all known information on the species Soosia diodonta (A. Ferussac, 1821) from Bulgaria. A new locality in urban environment, photos of live animals and the reproductive system of the species are given. New information on its ecology and biology is provided.

Four species of Campodeidae have been recorded from Sarnena Gora Mts. region from which Campodea (Dicampa) caucasica Rusek, 1965 and Campodea (Campodea) magna Ionescu, 1955 are new records to the fauna of Bulgaria.

. Annual harvest hunting data and counting statistics from 2009 to 2019 were used as methods for assessing changes in four Artiodactyla species population trends. The study area covers approximately 100,000 ha territory from Sredna Gora Mts. The results showed trend for a stable increase in the Red Deer population, because of provided conservation...

During a brief malacological survey, a total of 16 snail species were recorded (four mangrove amphibious, 12 terrestrial). For all the species new localities with GPS coordinates and habitat data are provided. The species Thapsia insulsa Preston, 1910 (Urocyclidae) is a new record to the island.

This case study presents new distribution data on 37 vertebrate species (1 fish, 4 lizards, 1 snake, 3 mammals, and 28 birds). All were registered at the area of North-West coast of Michamwi Peninsula.

A total of 28 species of 13 families were registered. All species recorded were new records to the Zanzibar autonomous region, ten to Tanzania, eight to East Africa and two (Lepidopsocus pretiosus (Banks, 1942) and Belaphopsocus murphyi Lienhard, 1991) were new to the entire African continent. Original photos of 22 of the found species were provide...

Altogether 12 species from six Diptera families are presented in this paper. The species Lipoptena fortisetosa Maa, 1965 and Euthera fascipennis (Loew, 1854) are new records to Bulgaria.

The species Lehmannia horezia Grosu et Lupu, 1962, Lehmannia nyctelia (Bourguiguat, 1861) and Oxychilus (Riedelius) depressus (Sterki, 1880) were newly recorded to Sarnena Gora Mts. After this report the known list of molluscs of this area consists of 112 species.

A total of 9 species were reported from three geographic areas of South-West Bulgaria (Kresna Gorge, Kozhuh Mt., and Ograzhden Mts.): Liposcelis bostrychophila, L. decolor, L. silvarum, Lachesilla pedicularia, L. bernardi, E. annulatus, E. moebiusi, Amphigerontia contaminata, and Neopsocus rhenanus

The study was carried out between 17.8.2020 and 22.8.2020 on Thassos Island during a short vacation. A total of 13 species were collected from 9 localities. The species Liposcelis silvarum (Kolbe, 1888) is a new record to the fauna of Greece. Considering the relatively rich variety of habitats on Thassos, it can be concluded that its Psocoptera fau...

A total of 23 individual illegal dumps were located at the 5x5 km sample area around the villages of Hrishteni and Kolena. About ¼ of them were situated near the Medven Hill, bordering with some agricultural lands. Their surface area can be spotted even on satellite images. Even the studied area is small it represents the real situation not only in...

Настоящият Кратък определител е изработен в рамките на проект „Повишаване на познанията за чуждите видове с помощта на гражданската наука: Подходи за изпълнение на гражданската наука за чуждите видове, управление на данните и стандарти“ (КП-06COST-13). Целта му е да предостави информация и повиши осведомеността на ползвателите за ИЧВ животни от зна...

Actual list of Mollusca known from Bulgaria till December 2020.

uction The moths of Sarnena Gora Mts are not studied in detail. Some species records were published by Nedyalkov (1909) for Stara Zagora, and by Tuleshkov (1965), mainly for the area of Stara Zagora City and Starozagorski Mineralni Bani Resort. Data for some new and rare for Bulgaria species, collected near Buzovgrad Village are presented in the ar...

A recent field work carried out by Dilian Georgiev revealed four samples with three hydrobiid species. These species have been misidentified by Clessin (1890), Angelov (1950), and Reischütz (1983). Re-examination of these species provided two Grossuana spp. and one Bythinella sp., all new for science. In addition the samples of syntypes of Bythinel...

Two species of Psocoptera (Insecta) are reported as new to the Bulgarian fauna: Philotarsus parviceps (Philotar-sidae) and Loensia fasciata (Psocidae). After this publication, the list of known barkfly species in the country contains a total of 67 species. A checklist is provided with references to the original records.

Five mollusc species were recorded on Thassos Island as new for the fauna of the island: Four gastropods (Aegopinella minor, Carychium minimum, Deroceras thersites, Limax graecus), and one clam (Pisidium personatum). Now the number of species recorded on the island is 83. This is one of the richest island malacofaunas of Greece.

The study was carried out between 20.8.2018-25.8.2018 and 22.7.2020-28.7.2020 on the Elafonisos Island (South Peloponnesus, Greece). Fifteen localities were surveyed and 32 species of terrestrial snails were found. Most interesting are the findings of Trochoidea trochoides (very rare in Greece) and of Vitrea argolica and Xeromunda vulgarissima (the...